I sympathize with whoever criticized the guy for loud typing. Seriously, it's distracting/disruptive. I learnt to type on (manual) typewriter too but laptops and keys don't need to be stabbed with the force of a thousand suns to register the press. It can be just as loud as people talking and (IMHO) can be harder to tune out. After all, we're used to hearing people talk all the time. Oh and while I'm in the mood for…
That said, holy hell I can't stand the sound. Nothing will make me flee a place faster than listening to someone slurp their food as they shovel it into their gaping maw.